*{
    margin:0;
    padding:0;
    list-style:none;
}
.flex{
    display:flex;
}
.justify{
    justify-content:  between-center;
}
.margin{
    margin:0 auto;
}
.border1{
    box-sizing: border-box;
    border:1px solid red;
}
.t-center{
    text-align: center;
}
.clear{
    clear: both;
}
.overhidden{
    overflow: hidden;
}
.cursor{
    cursor: pointer;
}